Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Linear Approximation in Frequency Domain

Linear Approximation in Frequency Domain

Linear systems are characterized by two main properties: superposition and homogeneity. Superposition allows the response to multiple inputs to be the sum of the responses to each individual input. Homogeneity ensures that scaling an input by a scalar results in the response being scaled by the same scalar.
In contrast, nonlinear systems do not inherently possess these properties. However, for small deviations around an operating point, a nonlinear system can often be approximated as linear....

Reconstruction of Signal using Interpolation

Reconstruction of Signal using Interpolation

Signal processing techniques are essential for accurately converting continuous signals to digital formats and vice versa. When a continuous signal is sampled with a period T, the resulting sampled signal exhibits replicas of the original spectrum in the frequency domain, spaced at intervals equal to the sampling frequency. To handle this sampled signal, a zero-order hold method can be applied, which creates a piecewise constant signal by retaining each sample's value until the next...

Linear Approximation in Time Domain

Linear Approximation in Time Domain

Nonlinear systems often require sophisticated approaches for accurate modeling and analysis, with state-space representation being particularly effective. This method is especially useful for systems where variables and parameters vary with time or operating conditions, such as in a simple pendulum or a translational mechanical system with nonlinear springs.
For a simple pendulum with a mass evenly distributed along its length and the center of mass located at half the pendulum's length,...

Design Example

Design Example

The innovation of touch-tone telephony revolutionized the telecommunications industry by replacing the traditional rotary dial with a dual-tone multi-frequency (DTMF) signaling system. This system uses a matrix-style keypad with buttons arranged in four rows and three columns, creating 12 distinct signals each assigned to a pair of frequencies. Each button press results in a simultaneous generation of two sinusoidal tones – one from a low-frequency group (697 to 941 Hz) and one from a...

Aliasing

Aliasing

Accurate signal sampling and reconstruction are crucial in various signal-processing applications. A time-domain signal's spectrum can be revealed using its Fourier transform. When this signal is sampled at a specific frequency, it results in multiple scaled replicas of the original spectrum in the frequency domain. The spacing of these replicas is determined by the sampling frequency.
If the sampling frequency is below the Nyquist rate, these replicas overlap, preventing the original...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Automated biomedical hypothesis generation with time-aware hypergraph contrastive learning.

Knowledge and information systems·2026

Same author

Cell-o1 : training LLMs to solve single-cell reasoning puzzles with reinforcement learning.

Bioinformatics (Oxford, England)·2026

Same author

β-Substitution and prodrug derivation leading to identification of fosmidomycin analogs with improved herbicidal activity.

Pest management science·2026

Same author

Genome-Wide Characterization of the <i>Expansin</i> Gene Family in Eggplant (<i>Solanum melongena</i> L.) Reveals Its Roles in Fruit Development and Heat Stress Response.

Plants (Basel, Switzerland)·2026

Same author

Integrating Social Determinants of Health in a Multi-Modal Deep Clustering Survival Model for Injury-Risk in Alzheimer's and Related Dementia Patients.

Proceedings of machine learning research·2026

Same author

Mode-division multiplexing enabled 2D optical phased array with large scale and wide field of view.

Optics letters·2026

Search research articles

Related Experiment Video

Updated: May 30, 2025

Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping

Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping

Published on: March 20, 2017

Towards 250-m gigabits-per-second underwater wireless optical communication using a low-complexity ANN equalizer.

Xiaohe Dong, Kuokuo Zhang, Caiming Sun

|January 29, 2025

Summary

This summary is machine-generated.

This study demonstrates a 1 Gbps underwater wireless optical communication (UWOC) system over 250 meters, overcoming aquatic attenuation and nonlinear impairments using a novel laser and receiver design with an artificial neural network equalizer.

More Related Videos

Quasi-light Storage for Optical Data Packets

Quasi-light Storage for Optical Data Packets

Published on: February 6, 2014

Wireless Electrophysiological Recording of Neurons by Movable Tetrodes in Freely Swimming Fish

Wireless Electrophysiological Recording of Neurons by Movable Tetrodes in Freely Swimming Fish

Published on: November 26, 2019

Related Experiment Videos

Last Updated: May 30, 2025

Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping

Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping

Published on: March 20, 2017

Quasi-light Storage for Optical Data Packets

Quasi-light Storage for Optical Data Packets

Published on: February 6, 2014

Wireless Electrophysiological Recording of Neurons by Movable Tetrodes in Freely Swimming Fish

Wireless Electrophysiological Recording of Neurons by Movable Tetrodes in Freely Swimming Fish

Published on: November 26, 2019

Area of Science:

Underwater wireless optical communication (UWOC)
Optical engineering
Signal processing

Background:

Underwater wireless optical communication (UWOC) is crucial for transmitting data over long distances underwater.
Aquatic attenuation and nonlinear impairments severely limit UWOC system performance, particularly data rates.
Existing methods struggle to balance extended range and high-speed data transmission.

Purpose of the Study:

To develop a robust UWOC system capable of high-speed data transmission over extended underwater distances.
To mitigate nonlinear impairments that degrade signal quality in UWOC systems.
To achieve 1 Gbps data transmission over 250 meters, a significant advancement in UWOC technology.

Main Methods:

Utilized a high-power transmitter combining 8-channel cascaded laser diodes (LD).
Employed a sensitive receiver using a silicon photomultiplier (SiPM).
Implemented a hybrid equalizer combining a linear equalizer with a low-complexity artificial neural network (ANN) equalizer (9-input, 2-hidden layers).

Main Results:

Achieved 1 Gbps data transmission over a 250-meter UWOC link, a record for this distance.
Reduced bit error rate (BER) to 3.4 × 10^-3 at 1 Gbps, below the HD-FEC limit.
The ANN-based system significantly outperformed linear (500 Mbps) and Volterra (750 Mbps) equalizers.

Conclusions:

The proposed hybrid linear and ANN equalizer effectively overcomes nonlinear impairments in long-distance UWOC.
This system represents a breakthrough in achieving Gbps-level data rates for underwater optical communication beyond 250 meters.
The findings pave the way for enhanced underwater communication networks.